´It was narrated that Al-Hasan and Muhammad said:` "Combing one's hair (should be done) every other day."
Explanation & Benefits
Hafiz Muhammad Ameen
In this statement, there is advice for those people who carry a comb in their pocket at all times. For a detailed discussion, see Hadith: 5057. The correct view is that all three of the aforementioned narrations are authentic due to supporting and corroborating reports.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 5060